Vibration-to-electricity conversion has been heavily researched over the last decade with the ultimate goal of enabling self-powered small electronic components to use in wireless applications ranging from medical implants to structural health monitoring sensors. Regardless of the transduction mechanism used in transforming vibrational energy into electricity, the existing research efforts have mostly focused on deterministic or stochastic harvesting of direct vibrational energy available at a fixed location in space. Such an approach is convenient to design and employ linear and nonlinear vibration-based energy harvesters, such as base-excited cantilevers with piezoelectric laminates. Although the harvesting of local vibrations using linear and nonlinear devices has been well studied, there has been little effort to investigate power extraction from elastic waves propagating in host structures to gain a fundamental understanding of power flow and to best exploit not only standing but also traveling wave energy. This paper explores the problem of piezoelectric energy harvesting from one-dimensional bending waves involving propagating and evanescent components with a focus on infinitely long thin beams. A pair of electroded piezoelectric patches is implemented as the energy harvesting interface connected to a complex electrical load. An analytical modeling framework is given in order to relate the harvested power to incoming wave in the presence of a generalized resistive-reactive circuit. Effects of energy harvesting on the global wave dynamics as well as individual propagating and evanescent wave components are investigated with an emphasis on the wavelength matching concept. The electrical loading conditions for maximum power and efficiency are identified for several special cases in the low frequency range.
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ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 16–18, 2013
Snowbird, Utah, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-5604-8
PROCEEDINGS PAPER
Harvesting of Bending Waves in One-Dimensional Infinite Beams Using Resistive-Reactive Circuits
Serife Tol,
Serife Tol
Georgia Institute of Technology, Atlanta, GA
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F. Levent Degertekin,
F. Levent Degertekin
Georgia Institute of Technology, Atlanta, GA
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Alper Erturk
Alper Erturk
Georgia Institute of Technology, Atlanta, GA
Search for other works by this author on:
Serife Tol
Georgia Institute of Technology, Atlanta, GA
F. Levent Degertekin
Georgia Institute of Technology, Atlanta, GA
Alper Erturk
Georgia Institute of Technology, Atlanta, GA
Paper No:
SMASIS2013-3139, V002T07A015; 7 pages
Published Online:
February 20, 2014
Citation
Tol, S, Degertekin, FL, & Erturk, A. "Harvesting of Bending Waves in One-Dimensional Infinite Beams Using Resistive-Reactive Circuits." Proceedings of the ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. Volume 2: Mechanics and Behavior of Active Materials; Structural Health Monitoring; Bioinspired Smart Materials and Systems; Energy Harvesting. Snowbird, Utah, USA. September 16–18, 2013. V002T07A015. ASME. https://doi.org/10.1115/SMASIS2013-3139
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